Correct Answer - Option 4 : Both 1 and 2
Equilibrium: It is a state of a body in which overall change in a body is zero.
Translational Equilibrium: A body is said to be in translational equilibrium if the net sum of all the forces (F) acting on a body is zero.
Σ F = 0
Fnet = 0
F1 + F2 + F3+ ............... + Fn = 0
Rotational Equilibrium: A body is said to be in rotational equilibrium if the net sum of all the torque (τ) acting on a body is zero.
Σ τ = 0
τnet = 0
τ1 +τ2 + τ3 + .................. + τn = 0
- A body is said to be in equilibrium if it is in translational equilibrium and rotational equilibrium.
- Both translational and rotational equilibrium is required to a body in equilibrium.
Hence option 4 is correct.
- Solving the numerical problem on the equilibrium of forces always draws the FBD (Fee Body Diagram).
- A simplified version of the body on which all external forces are shown is called FBD (Fee Body Diagram) of the given body.